Chuck.



E. E. Ru'ssm.

- CHUCK. mucn'lon min none. nu.

mmron Patented Feb. 25, 1919.

55 device EDWARD E. RUSSELL, or nos ANGELES; CALIFORNIA.

CHUCK.

Specification of Letters Patent.

Patented Feb: 25, 1919.

Application filed November 6; 1917. Serial N 200,523.

= To all whom it may concern:

Be it known that I, EDWARD E. RUssELL,

I a'citizen of the United'States.residing at L0s' Ajngeles,*in the county of Los Aj-ngeles and'statewof California, have invented a' -new'anduseful Ghuckmf which the follow- 1 ing is a. specification.

-My invention relates to chucks'for niachine-tools and has for its 'mainobject to lo preventwthe breaking of the tool or the breaking- 0f :thematerial finished by the aspacebetween 'this shoulder lt andthe v tool.

:Another object is to provide a chuck which canwbe-usedon a turrethead of a machine-tool.

--Anothe-r= object is toprovide a catch withinthe tool which will prevent the wearing woif ofcthe engaging part of the catch when the' turret-headhas been Stopped in its i movement on the machine-tool.

: Another object is to provide a catch within theflchuck which will turn-away fromthe v engagingqpart-inthe chuck when the chuck comes to a stopping point onv the work.

Anotherobject is to. construct a chuck em bodying my-invention for adie holder on I the turret Y head of a machinetool.

-Another object is-toconstruct such chuck that the work can be Another object is to engaging parts within the chuck for operating'ithe chuck-' when turning in the right direction for threading with the die in the tool.

Other objects will appear from the foll0wing description and appended claims as well as from the accompanying drawing.

In the drawing Figure 1 is a side view of my device with the inclosing sleeve shown in section.

Fig. 2 is a cross-section on line 2-2 of Fig. 1.

, in the direction of the arrows H in Fig. 1,

Fig. 5 is an end view of the engaging means on my device for withdrawing the chuck from the work.

In Fig. 1, 6 designates the stock of my to be secured to the machine-tool especially to the turret head of such machine-tool.

threaded end 12. onjthe threaded end 12- for; screwing a die threaded end -head 7, dogs 18' gare pivotally seen when passing 30 through the die in such chuck.

provide engagingmeans within the toolfor unscrewing the die from the work without touching the 24 are providedon the with the tool, and the a This stock'is provided with a head 7',-the'wholebeing provided with a bore 8; through which a stem 9 slidingly'and "turnablyfits.

. The stem 9 is also provided with'a head 10 of similar diameter as the head 7 on thestock; [The head 10 is provided with extensions 11 terminating in a A ring 13 fits turnably tothestem, for this a shoulder 1 1 inthe front-end of the ring 13-is provided leaving end of the threaded end 12 within the ri-ng.

A bore 15 is provided through the 12 and the extensions 11 toward the headlO leaving a free: space 16 between the extensions 11 st that the work may be seenwhen passingthrough the die inserted in the ring 13 and through the threadedend 12.

head 10 a clutch is On the rear side of the formed by the jaws 17 projecting toward the head 7. 1 Within the mounted to engage with the jaws 17- on the headlO.

=A suitable recess 19 is cut for each dog into the side of the head 7 and the suitable revcesses 20-are provided for the blocks 21. The blocks 21 are secured to the head by the screws 23 having round lugs22, forming the pivot for the dogs. counteracting levers dogs-on the opposite side of the catch-part-ofthe dogs 18. A spring 25 is inserted into eachof the recesses 19 seated in the recess against the counteracting levers-2a. The end26 of the stock 6 is. helical-shaped forming a shoulder 27.

The end of the stem 9 is provided with a recess 28 for the body 29 of the pin 30. The pin 80 is secured to the end of the stem 9 bythe screw 31.

Having disposed the stock 6 of this tool into a proper place on the machine tool especially in the turret head of a lathe, as soon as such tool is brought into contact with the work on the lathe, the head 10 on the stem naturally presses toward the head 7 on the stock and the jaws 17 are made to engage with the dogs 18, when a die inserted into this tool naturally becomes'stationary turning work in the lathe moves into and through the die in the desired manner until the turret head comes to a position in which a stop on the machine rotationof the work, the

Coming to such stopping position the dogs 18 disengage from the jaws 17, and the spring 25 pushes the dogs into the position indicated at 32, taking the engaging ends of the dogs far enough away from the jaws 17 so that a further turning of the work will not wear off the sharp points of the engaging parts on the dogs. This is of great advantage as under such construction the dogs will not be liable to a wearing-0E by the passing of the jaws while the work with the die on it is still turning with the lathe insuring always the same distance in the travel of the tool toward the work which is desired by turret heads on turret machine tools.

Having finished the work such turret heads are naturally withdrawn by reversing the machine-tool and in this device, by reversing the machine tool and thereby the stock 6 moves on the stem 9 toward the pin 80 until the shoulder 27 on the stock engages with the pin 30 when thetool is withdrawn from the work as will easily be understood.

To protect the jaws and the dogs from dust and waste material a sleeve 33 is provided to inclose the two heads-7 and 8 with the operating mechanism in such heads. The screw 34 serves to, screw the sleeve 33 to the head 7 and at the same time close an 7 oiling hole 35 for getting oil between the stock 6 and the stem 9.

This device is especially small work,

Having thus described my invention,

I claim 1.- In a chuck of the class described comprising a stock end and a tool-holding end,

a suitable number of dogs pivotally mounted within the tool having each a beveled end for engaglngthe stock part with the tool- Gopies of this patent may be obtained for adapted for holding partadapted to clear when not so engaged, the long part of the beveled ends forming the engaging part when stock and tool-holding part are 1n engaging position 2. In a chuck of the class described comprising a stock part to be secured to a suitable place on the machine tool and a toolholding part turnably disposed in the stock part having jaw members facing thestock part, a suitable number of dogs pivotally secured to the stock part having means for automatically turning out of the way of the jaw members on the tool-holding part the moment when the dogs disengage from the jaw members whilethe jaw memberswith the tool-holding part is still rotating.

3. In a chuck of the class described comprising a stock part to be secured to asuitable place on the machine tool and a toolholding part turnably disposed in the stock part having jaw members facing the stock part, a suitable number of dogs pivotally secured to the stock part of the chuck having a beveled engaging member each facing with the longer side thejaws on the toolholding member or part, and a suitable number of springs disposed between dogs and the stock part for holding the beveled ends of the dogs spaced from the jaws on the toolholding part when the tool-holding part is still engaged with the work.

In testimony whereof I hereunto aflix my signature in the presence of two witnesses.

EDWARD n. RUSSELL.

Witnesses:

OTTO H. KRUnzEn, M. W. Oms.

five cents each, by addressing the Commissioner of Patents,

Washington, .D. G." 

